本文介绍了spring-boot 允许接口跨域并实现拦截（CORS），分享给大家，也给自己留个笔记
pom.xml(依赖的jar)
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// 在spring-boot-starter-web的启动器中，已经依赖好了<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId></dependency> |
CORS跨域的配置（主要配置允许什么样的方法跨域）
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import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.web.cors.CorsConfiguration;import org.springframework.web.cors.UrlBasedCorsConfigurationSource;import org.springframework.web.filter.CorsFilter;import org.springframework.web.servlet.config.annotation.CorsRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;import java.util.ArrayList;import java.util.List;/** * Created by Msater Zg on 2017/4/3. */@Configurationpublic class CorsConfig extends WebMvcConfigurerAdapter { @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping("/**") .allowedOrigins("*") .allowCredentials(true) .allowedMethods("GET", "POST", "DELETE", "PUT") .maxAge(3600); } private CorsConfiguration buildConfig() { CorsConfiguration corsConfiguration = new CorsConfiguration(); List<String> list = new ArrayList<>(); list.add("*"); corsConfiguration.setAllowedOrigins(list); /* // 请求常用的三种配置，*代表允许所有，当时你也可以自定义属性（比如header只能带什么，只能是post方式等等） */ corsConfiguration.addAllowedOrigin("*"); corsConfiguration.addAllowedHeader("*"); corsConfiguration.addAllowedMethod("*"); return corsConfiguration; } @Bean public CorsFilter corsFilter() { UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); source.registerCorsConfiguration("/**", buildConfig()); return new CorsFilter(source); }} |
拦截器配置(可以根据不同路径，配置不同的拦截器)
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import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * Created by Msater Zg on 2017/4/5. * 拦截器 */public class ApiInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // 请求前调用 System.out.println("拦截了"); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { // 请求过程中调用 System.out.println("拦截了"); } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { // 请求完成时调用 System.out.println("拦截了"); }} |
拦截器管理类，用于生成项目的拦截器链
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import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.InterceptorRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;/** * Created by Msater Zg on 2017/4/5. * 拦截器管理工具 */@Configurationpublic class MyWebAppConfigurer extends WebMvcConfigurerAdapter { @Override public void addInterceptors(InterceptorRegistry registry) { // 多个拦截器组成一个拦截器链 // addPathPatterns 用于添加拦截规则 // excludePathPatterns 用户排除拦截 registry.addInterceptor(new ApiInterceptor()).addPathPatterns("/user/**"); //对来自/user/** 这个链接来的请求进行拦截 super.addInterceptors(registry); }} |
结语
实现跨域的方式有很多，这只是其中一种。有什么不对的地方希望能及时指出。谢谢！
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.jianshu.com/p/db0d8d45c242?utm_source=tuicool&utm_medium=referral
